Nancy Klein, LCSW
NPI 1639238421 · Clinical Social Worker · New York, NY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Klein, LCSW is a Clinical Social Worker provider in New York, NY (NPI 1639238421).
Provider details
- NPI number
- 1639238421
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- PR015476-1 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-07
- Last updated
- 2007-07-08
Frequently asked questions
- What is Nancy Klein's NPI number?
- Nancy Klein's National Provider Identifier (NPI) is 1639238421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Klein's specialty?
- Nancy Klein is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Nancy Klein located?
- Nancy Klein's practice location on file with NPPES is 11 Riverside Dr, New York, NY 10023-2504.
- What is Nancy Klein's phone number?
- The practice phone number listed in the NPPES registry for Nancy Klein is (212) 721-7240.
- Does Nancy Klein accept Medicare?
- Nancy Klein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Klein's NPI active?
- Yes — Nancy Klein's NPI (1639238421) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.